The 51-story white New Orleans skyscraper known as One Shell Square since it opened in 1972 will be called the Hancock Whitney Center beginning next year.

Mississippi-based Hancock Holding Co. will move headquarters of its Whitney Bank subsidiary and 400 employees into seven or more floors that it's leasing. The bank's overall headquarters will remain in Gulfport.

Bank executives wouldn't detail to local media their plans for the building Whitney has occupied since 1911. Officials say they'd outgrown the building and employees are scattered across locations.

Whitney's southeast Louisiana presence grew this year when it took over the failed First NBC Bank.

Shell Oil Co. will maintain 1,400 workers on 18 floors of the building, down from 2,300 workers two years ago.